Specifications:1. Model:MP15842. Name:DC-DC step-down module3. Input Voltage: 4.5V ~ 28V4. Output voltage: 0.8V ~ 20V5. Output Current: 3A (Max)6. Conversion efficiency: 96% (maximum)7. Output Ripple: <30mV8. Switching frequency: 1.5MHz (highest) typically 1MHz9. Operating Temperature: -45°C ~ +85°C10. Size: 22mm * 17mm (L * W )11. Application areas: DIY mobile power, monitor power supply, power buggies, camera power supply, car power, communications equipment supply,      etc.Packge included:1 x Step Down Module